Either you didn't play this game or you are willfully obtuse. When you play a mind-control/harem game you are generally interested in a story with the MC in power/focus. As you stated, the changes the mc made are mainly to the bodies of the girls, and they get done because they ask him to do them. No mind rape there. I never played the asshole route so for me, it was a lighthearted harem game, which did a full 180 without a good reason only because the dev has seen the movie sixth sense the first fucking time (played the last of us 2 but potayto, potahto). So yes I (and everyone else) can complain about that, just like I would complain when an antagonist with mind control powers would rape my harem girls out of nowhere. Because in that case, the mindcontrol tags mean shit just like in the turn the story took.
and his fucking justification is: "duuh mind control bad"
you don't say really? shit take for a dev of a fucking mind control porn game.
And when you deem the consequences appropriate to whatever happened on the bad route, then that's fine and dandy, I never played the bad route so I wouldn't know. For the good route that shit came out of nowhere. If the pool party event would have been a major split in the storyline between good and bad I and probably no one else would had said anything.